Luko is a character in the episode The Infernal Machine of the television series Extreme Ghostbusters.
Luko is a demon that feeds off of electricity. It inspired inventor Antonio Garibaldi to build a machine called the Infernal Machine. Luko then possessed the machine and when Garibaldi shut it down and tried to warn people he was locked away for heresy.
After the machine was put in a museum, Luko managed to escape by possessing another toy robot. It jumps from one piece of Ghostbuster equipment to another rendering them useless. Luko influenced Roland Jackson to create another Infernal Machine from repurposed Ghostbusting equipment. Finally he realized that he could utilize the trap in the chest cavity to capture Luko.